China Inspection

Shenzhen WeCheck CTS Co Ltd

Goodsolutionsfor yourbusiness!

Preshipment Inspection > Security Camera Door Phone Bell Web Cam Microphone Speaker Alarm Monitor

The PSI QC Check Quality Pre-shipment Inspections for Security Cameras, Door Phones, Doorbells, WebCams, Door Cameras, Door Microphones, and Door Speakers etc.:

  • Labels, markings, logos & barcodes check
  • Product specs, and special requirements check
  • Packaging, safety and drop tests
  • Quantity & assortment verifying
  • On-site safety, regulation & function testing
  • Measurements & sizes check
  • Aesthetic, visual defects, workmanship, surface and function check

The pre-shipment inspections are mostly Final Random Inspections, and sometimes we also have:

door phone quality inspections

Please find below for an example of the preshipment inspections for doorbells:

Perform a carton drop test on the export cartons:10 times(1 corner 3 edges 6 faces)-S1    PASSED
Smell check-check if there are any strong offensive odor-II    PASSED
For 3M tape adhesive test: perform test on coating
(painting/plating/ screen printing, etc) with 3M tape.-S2 
Emission 20dB BandwithC.FR47
1.发射器 20dB 带宽
第 15.231(c)节:对于工作在 70 MHz 以上且 900 MHz 以下的设备,发射带宽不应大于中心频率的 0.25%。对于工作在900 MHz 以上的设备。带宽是在距离调制载波 20 dB 处确定
的。可知,对于中心频率工作在 433.92MHz 的设备,其 20dB 带宽限值是 1.08MHz。
  1. 测试场景
  2. 测试方法
B.将频谱分析仪的 RBW 和 VBW 设置为适用值,大保持峰值。 C.采用频谱分析仪中的 PEAK 输出读数和 20dB BW 功能。
The factory has no equipment to test.  FAILED
transmitterTimeoutC.FR47 FCC 发送器时间测量
  1. 限值第 15.231(a)(1)节:手动操作的变送器应使用一个开关,该开关将在不超过 5 秒的时间内自动停用变送器。
  2. 测试场景
  3. 测试方法
B.设定中心频率为 433.92MHz,设定范围为 0Hz。
C.使用 Peak 将频谱分析仪的 RBW 和 VBW 设置为适用的值。
The factory has no equipment to test.  FAILED
The transmitter radiated spurious emission 发射机辐射杂散发射
  1. 限值第 15.209 节(a)第 15.231(b)节
  2. 测试场景
  3. 测试方法
A.在 9kHz 至 30MHz 的频率范围内,使用环路测试天线测量磁场。测试天线定位时其平面垂直于距离 EUT 1 米。环路测试天线的中心距离地面 1 米。在测量期间,环路测试天线围绕其垂直轴旋转,以在 EUT 周围的每个方位角处获得大响应。
B.在 30MHz 以上的频率范围内,使用 Bi-Log 测试天线(30MHz 至 1GHz)和喇叭测试天线(1GHz 以上)。测试天线距离 EUT 3 米。测试天线高度在地面以上 1m 至 4m 之间变化以确定场强的大值,转盘的方位角范围为 0°至 360°,接收天线具有水平 和垂直两个极化。当进行 1GHz 以上的测量时,EUT 被置于喇叭天线的 3dB 波束宽度范围内,并且 EUT 在 ANSI C63.4 中针 对辐射发射推荐的 3 个正交位置进行测试,并且呈现了坏情况数据。
The factory has no equipment to test.  FAILED
Perform a function test II
You put the receiver in the wallsocket, and the pushbutton generate kinetic energy. The last time the problem is that the pushbutton is not always good. You need to push them more then ones, or there are other problems.


Wireless distance Check--无线距离测试(有墙和无墙测试>100m)-II    PASSED
Check relevant international certification (Such as CE/UL/FCC/ROHS)   N/A
Perform an internal check. - S1   N/A

3rd party preshipment products goods factory onsite inline final Random AQL PSI TPI FRI DUPRO third party on-site in-line pre-shipment QA QC check quality control assurance inspection services in China India Vietnam Thailand Malaysia Bangladesh Taiwan.